HMS Affray P-421

Type:
Submarine
Class:
A (Amphion)
Number in Class:
Pennant Number :
P-421
Built By:
Cammell Laird
Birkenhead, England
Keel Laid Down:
January 16, 1944
Launched:
April 12, 1945
Commissioned:
May 2, 1946
Decommissioned:
N/A
Stricken:
N/A
Fate:
April 16, 1951 Sank in the English Channel on a training cruise due to a diving accident.
67 miles SW of St. Catherine's Light, Isle of Wight at 49.50.023N-02.34.533W
With the loss of all 75 of her crew.
Note: Dimensions and armament are general for class as built.
Length:
280' 6"
Beam:
22' 4"
Draft:
16' 9"
Displacement:
1,385 (Surfaced)
1,620 (Submerged)
Depth Limit:
350'
Speed:
18.5 knots (Surfaced)
8 knots (Submerged)
Range:
10,500 (Surfaced at 11 knots)
16 (Submerged at 8 knots)
Armament:
10 x 21" torpedo tubes (6 forward, 4 aft.)
Note: 2 each forward and aft were external one shot tubes which were later removed.
20 torpedoes or 26 mines
1 x 4" deck gun
1 x 20mm Oerlikon
3 x .303 cal. machine guns
Crew:
61
Notes:
Surviving boats modernized between 1955-1960. Both forward and aft sections were
rebuilt, sail modified and the external torpedo tubes were removed.



Builder's Data
Page published May 10, 2006